/***************************************************************************** | |
* auth.c - Network Authentication and Phase Control program file. | |
* | |
* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. | |
* Copyright (c) 1997 by Global Election Systems Inc. All rights reserved. | |
* | |
* The authors hereby grant permission to use, copy, modify, distribute, | |
* and license this software and its documentation for any purpose, provided | |
* that existing copyright notices are retained in all copies and that this | |
* notice and the following disclaimer are included verbatim in any | |
* distributions. No written agreement, license, or royalty fee is required | |
* for any of the authorized uses. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR | |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
* REVISION HISTORY | |
* | |
* 03-01-01 Marc Boucher <marc@mbsi.ca> | |
* Ported to lwIP. | |
* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. | |
* Ported from public pppd code. | |
*****************************************************************************/ | |
/* | |
* auth.c - PPP authentication and phase control. | |
* | |
* Copyright (c) 1993 The Australian National University. | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms are permitted | |
* provided that the above copyright notice and this paragraph are | |
* duplicated in all such forms and that any documentation, | |
* advertising materials, and other materials related to such | |
* distribution and use acknowledge that the software was developed | |
* by the Australian National University. The name of the University | |
* may not be used to endorse or promote products derived from this | |
* software without specific prior written permission. | |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
* | |
* Copyright (c) 1989 Carnegie Mellon University. | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms are permitted | |
* provided that the above copyright notice and this paragraph are | |
* duplicated in all such forms and that any documentation, | |
* advertising materials, and other materials related to such | |
* distribution and use acknowledge that the software was developed | |
* by Carnegie Mellon University. The name of the | |
* University may not be used to endorse or promote products derived | |
* from this software without specific prior written permission. | |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
*/ | |
#include "ppp.h" | |
#if PPP_SUPPORT > 0 | |
#include "fsm.h" | |
#include "lcp.h" | |
#include "pap.h" | |
#include "chap.h" | |
#include "auth.h" | |
#include "ipcp.h" | |
#if CBCP_SUPPORT > 0 | |
#include "cbcp.h" | |
#endif | |
#include "pppdebug.h" | |
/*************************/ | |
/*** LOCAL DEFINITIONS ***/ | |
/*************************/ | |
/* Bits in auth_pending[] */ | |
#define PAP_WITHPEER 1 | |
#define PAP_PEER 2 | |
#define CHAP_WITHPEER 4 | |
#define CHAP_PEER 8 | |
/************************/ | |
/*** LOCAL DATA TYPES ***/ | |
/************************/ | |
/* Used for storing a sequence of words. Usually malloced. */ | |
struct wordlist { | |
struct wordlist *next; | |
char word[1]; | |
}; | |
/***********************************/ | |
/*** LOCAL FUNCTION DECLARATIONS ***/ | |
/***********************************/ | |
extern char *crypt (const char *, const char *); | |
/* Prototypes for procedures local to this file. */ | |
static void network_phase (int); | |
static void check_idle (void *); | |
static void connect_time_expired (void *); | |
#if 0 | |
static int login (char *, char *, char **, int *); | |
#endif | |
static void logout (void); | |
static int null_login (int); | |
static int get_pap_passwd (int, char *, char *); | |
static int have_pap_secret (void); | |
static int have_chap_secret (char *, char *, u32_t); | |
static int ip_addr_check (u32_t, struct wordlist *); | |
#if 0 /* PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 */ | |
static void set_allowed_addrs(int unit, struct wordlist *addrs); | |
static void free_wordlist (struct wordlist *); | |
#endif | |
#if CBCP_SUPPORT > 0 | |
static void callback_phase (int); | |
#endif | |
/******************************/ | |
/*** PUBLIC DATA STRUCTURES ***/ | |
/******************************/ | |
/*****************************/ | |
/*** LOCAL DATA STRUCTURES ***/ | |
/*****************************/ | |
#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 | |
/* The name by which the peer authenticated itself to us. */ | |
static char peer_authname[MAXNAMELEN]; | |
#endif | |
/* Records which authentication operations haven't completed yet. */ | |
static int auth_pending[NUM_PPP]; | |
/* Set if we have successfully called login() */ | |
static int logged_in; | |
/* Set if we have run the /etc/ppp/auth-up script. */ | |
static int did_authup; | |
/* List of addresses which the peer may use. */ | |
static struct wordlist *addresses[NUM_PPP]; | |
/* Number of network protocols which we have opened. */ | |
static int num_np_open; | |
/* Number of network protocols which have come up. */ | |
static int num_np_up; | |
#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 | |
/* Set if we got the contents of passwd[] from the pap-secrets file. */ | |
static int passwd_from_file; | |
#endif | |
/***********************************/ | |
/*** PUBLIC FUNCTION DEFINITIONS ***/ | |
/***********************************/ | |
/* | |
* An Open on LCP has requested a change from Dead to Establish phase. | |
* Do what's necessary to bring the physical layer up. | |
*/ | |
void link_required(int unit) | |
{ | |
AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit)); | |
} | |
/* | |
* LCP has terminated the link; go to the Dead phase and take the | |
* physical layer down. | |
*/ | |
void link_terminated(int unit) | |
{ | |
AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit)); | |
if (lcp_phase[unit] == PHASE_DEAD) | |
return; | |
if (logged_in) | |
logout(); | |
lcp_phase[unit] = PHASE_DEAD; | |
AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n")); | |
pppMainWakeup(unit); | |
} | |
/* | |
* LCP has gone down; it will either die or try to re-establish. | |
*/ | |
void link_down(int unit) | |
{ | |
int i; | |
struct protent *protp; | |
AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit)); | |
if (did_authup) { | |
/* XXX Do link down processing. */ | |
did_authup = 0; | |
} | |
for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) { | |
if (!protp->enabled_flag) | |
continue; | |
if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) | |
(*protp->lowerdown)(unit); | |
if (protp->protocol < 0xC000 && protp->close != NULL) | |
(*protp->close)(unit, "LCP down"); | |
} | |
num_np_open = 0; | |
num_np_up = 0; | |
if (lcp_phase[unit] != PHASE_DEAD) | |
lcp_phase[unit] = PHASE_TERMINATE; | |
pppMainWakeup(unit); | |
} | |
/* | |
* The link is established. | |
* Proceed to the Dead, Authenticate or Network phase as appropriate. | |
*/ | |
void link_established(int unit) | |
{ | |
int auth; | |
int i; | |
struct protent *protp; | |
lcp_options *wo = &lcp_wantoptions[unit]; | |
lcp_options *go = &lcp_gotoptions[unit]; | |
#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 | |
lcp_options *ho = &lcp_hisoptions[unit]; | |
#endif | |
AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit)); | |
/* | |
* Tell higher-level protocols that LCP is up. | |
*/ | |
for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) | |
if (protp->protocol != PPP_LCP && protp->enabled_flag | |
&& protp->lowerup != NULL) | |
(*protp->lowerup)(unit); | |
if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) { | |
/* | |
* We wanted the peer to authenticate itself, and it refused: | |
* treat it as though it authenticated with PAP using a username | |
* of "" and a password of "". If that's not OK, boot it out. | |
*/ | |
if (!wo->neg_upap || !null_login(unit)) { | |
AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n")); | |
lcp_close(unit, "peer refused to authenticate"); | |
return; | |
} | |
} | |
lcp_phase[unit] = PHASE_AUTHENTICATE; | |
auth = 0; | |
#if CHAP_SUPPORT > 0 | |
if (go->neg_chap) { | |
ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype); | |
auth |= CHAP_PEER; | |
} | |
#endif | |
#if PAP_SUPPORT > 0 && CHAP_SUPPORT > 0 | |
else | |
#endif | |
#if PAP_SUPPORT > 0 | |
if (go->neg_upap) { | |
upap_authpeer(unit); | |
auth |= PAP_PEER; | |
} | |
#endif | |
#if CHAP_SUPPORT > 0 | |
if (ho->neg_chap) { | |
ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype); | |
auth |= CHAP_WITHPEER; | |
} | |
#endif | |
#if PAP_SUPPORT > 0 && CHAP_SUPPORT > 0 | |
else | |
#endif | |
#if PAP_SUPPORT > 0 | |
if (ho->neg_upap) { | |
if (ppp_settings.passwd[0] == 0) { | |
passwd_from_file = 1; | |
if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) | |
AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n")); | |
} | |
upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd); | |
auth |= PAP_WITHPEER; | |
} | |
#endif | |
auth_pending[unit] = auth; | |
if (!auth) | |
network_phase(unit); | |
} | |
/* | |
* The peer has failed to authenticate himself using `protocol'. | |
*/ | |
void auth_peer_fail(int unit, u16_t protocol) | |
{ | |
AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol)); | |
/* | |
* Authentication failure: take the link down | |
*/ | |
lcp_close(unit, "Authentication failed"); | |
} | |
#if PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 | |
/* | |
* The peer has been successfully authenticated using `protocol'. | |
*/ | |
void auth_peer_success(int unit, u16_t protocol, char *name, int namelen) | |
{ | |
int pbit; | |
AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol)); | |
switch (protocol) { | |
case PPP_CHAP: | |
pbit = CHAP_PEER; | |
break; | |
case PPP_PAP: | |
pbit = PAP_PEER; | |
break; | |
default: | |
AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", | |
protocol)); | |
return; | |
} | |
/* | |
* Save the authenticated name of the peer for later. | |
*/ | |
if (namelen > sizeof(peer_authname) - 1) | |
namelen = sizeof(peer_authname) - 1; | |
BCOPY(name, peer_authname, namelen); | |
peer_authname[namelen] = 0; | |
/* | |
* If there is no more authentication still to be done, | |
* proceed to the network (or callback) phase. | |
*/ | |
if ((auth_pending[unit] &= ~pbit) == 0) | |
network_phase(unit); | |
} | |
/* | |
* We have failed to authenticate ourselves to the peer using `protocol'. | |
*/ | |
void auth_withpeer_fail(int unit, u16_t protocol) | |
{ | |
int errCode = PPPERR_AUTHFAIL; | |
AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol)); | |
if (passwd_from_file) | |
BZERO(ppp_settings.passwd, MAXSECRETLEN); | |
/* | |
* XXX Warning: the unit number indicates the interface which is | |
* not necessarily the PPP connection. It works here as long | |
* as we are only supporting PPP interfaces. | |
*/ | |
pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode); | |
/* | |
* We've failed to authenticate ourselves to our peer. | |
* He'll probably take the link down, and there's not much | |
* we can do except wait for that. | |
*/ | |
} | |
/* | |
* We have successfully authenticated ourselves with the peer using `protocol'. | |
*/ | |
void auth_withpeer_success(int unit, u16_t protocol) | |
{ | |
int pbit; | |
AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol)); | |
switch (protocol) { | |
case PPP_CHAP: | |
pbit = CHAP_WITHPEER; | |
break; | |
case PPP_PAP: | |
if (passwd_from_file) | |
BZERO(ppp_settings.passwd, MAXSECRETLEN); | |
pbit = PAP_WITHPEER; | |
break; | |
default: | |
AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", | |
protocol)); | |
pbit = 0; | |
} | |
/* | |
* If there is no more authentication still being done, | |
* proceed to the network (or callback) phase. | |
*/ | |
if ((auth_pending[unit] &= ~pbit) == 0) | |
network_phase(unit); | |
} | |
#endif | |
/* | |
* np_up - a network protocol has come up. | |
*/ | |
void np_up(int unit, u16_t proto) | |
{ | |
AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto)); | |
if (num_np_up == 0) { | |
AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit)); | |
/* | |
* At this point we consider that the link has come up successfully. | |
*/ | |
if (ppp_settings.idle_time_limit > 0) | |
TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit); | |
/* | |
* Set a timeout to close the connection once the maximum | |
* connect time has expired. | |
*/ | |
if (ppp_settings.maxconnect > 0) | |
TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect); | |
} | |
++num_np_up; | |
} | |
/* | |
* np_down - a network protocol has gone down. | |
*/ | |
void np_down(int unit, u16_t proto) | |
{ | |
AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto)); | |
if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) { | |
UNTIMEOUT(check_idle, NULL); | |
} | |
} | |
/* | |
* np_finished - a network protocol has finished using the link. | |
*/ | |
void np_finished(int unit, u16_t proto) | |
{ | |
AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto)); | |
if (--num_np_open <= 0) { | |
/* no further use for the link: shut up shop. */ | |
lcp_close(0, "No network protocols running"); | |
} | |
} | |
/* | |
* auth_reset - called when LCP is starting negotiations to recheck | |
* authentication options, i.e. whether we have appropriate secrets | |
* to use for authenticating ourselves and/or the peer. | |
*/ | |
void auth_reset(int unit) | |
{ | |
lcp_options *go = &lcp_gotoptions[unit]; | |
lcp_options *ao = &lcp_allowoptions[0]; | |
ipcp_options *ipwo = &ipcp_wantoptions[0]; | |
u32_t remote; | |
AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit)); | |
ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL)); | |
ao->neg_chap = !ppp_settings.refuse_chap && ppp_settings.passwd[0] != 0 /*have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0)*/; | |
if (go->neg_upap && !have_pap_secret()) | |
go->neg_upap = 0; | |
if (go->neg_chap) { | |
remote = ipwo->accept_remote? 0: ipwo->hisaddr; | |
if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) | |
go->neg_chap = 0; | |
} | |
} | |
#if PAP_SUPPORT > 0 | |
/* | |
* check_passwd - Check the user name and passwd against the PAP secrets | |
* file. If requested, also check against the system password database, | |
* and login the user if OK. | |
* | |
* returns: | |
* UPAP_AUTHNAK: Authentication failed. | |
* UPAP_AUTHACK: Authentication succeeded. | |
* In either case, msg points to an appropriate message. | |
*/ | |
int check_passwd( | |
int unit, | |
char *auser, | |
int userlen, | |
char *apasswd, | |
int passwdlen, | |
char **msg, | |
int *msglen | |
) | |
{ | |
#if 1 | |
*msg = (char *) 0; | |
return UPAP_AUTHACK; /* XXX Assume all entries OK. */ | |
#else | |
int ret = 0; | |
struct wordlist *addrs = NULL; | |
char passwd[256], user[256]; | |
char secret[MAXWORDLEN]; | |
static u_short attempts = 0; | |
/* | |
* Make copies of apasswd and auser, then null-terminate them. | |
*/ | |
BCOPY(apasswd, passwd, passwdlen); | |
passwd[passwdlen] = '\0'; | |
BCOPY(auser, user, userlen); | |
user[userlen] = '\0'; | |
*msg = (char *) 0; | |
/* XXX Validate user name and password. */ | |
ret = UPAP_AUTHACK; /* XXX Assume all entries OK. */ | |
if (ret == UPAP_AUTHNAK) { | |
if (*msg == (char *) 0) | |
*msg = "Login incorrect"; | |
*msglen = strlen(*msg); | |
/* | |
* Frustrate passwd stealer programs. | |
* Allow 10 tries, but start backing off after 3 (stolen from login). | |
* On 10'th, drop the connection. | |
*/ | |
if (attempts++ >= 10) { | |
AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user)); | |
/*ppp_panic("Excess Bad Logins");*/ | |
} | |
if (attempts > 3) { | |
sys_msleep((attempts - 3) * 5); | |
} | |
if (addrs != NULL) { | |
free_wordlist(addrs); | |
} | |
} else { | |
attempts = 0; /* Reset count */ | |
if (*msg == (char *) 0) | |
*msg = "Login ok"; | |
*msglen = strlen(*msg); | |
set_allowed_addrs(unit, addrs); | |
} | |
BZERO(passwd, sizeof(passwd)); | |
BZERO(secret, sizeof(secret)); | |
return ret; | |
#endif | |
} | |
#endif | |
/* | |
* auth_ip_addr - check whether the peer is authorized to use | |
* a given IP address. Returns 1 if authorized, 0 otherwise. | |
*/ | |
int auth_ip_addr(int unit, u32_t addr) | |
{ | |
return ip_addr_check(addr, addresses[unit]); | |
} | |
/* | |
* bad_ip_adrs - return 1 if the IP address is one we don't want | |
* to use, such as an address in the loopback net or a multicast address. | |
* addr is in network byte order. | |
*/ | |
int bad_ip_adrs(u32_t addr) | |
{ | |
addr = ntohl(addr); | |
return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET | |
|| IN_MULTICAST(addr) || IN_BADCLASS(addr); | |
} | |
#if CHAP_SUPPORT > 0 | |
/* | |
* get_secret - open the CHAP secret file and return the secret | |
* for authenticating the given client on the given server. | |
* (We could be either client or server). | |
*/ | |
int get_secret( | |
int unit, | |
char *client, | |
char *server, | |
char *secret, | |
int *secret_len, | |
int save_addrs | |
) | |
{ | |
#if 1 | |
int len; | |
struct wordlist *addrs; | |
addrs = NULL; | |
if(!client || !client[0] || strcmp(client, ppp_settings.user)) { | |
return 0; | |
} | |
len = strlen(ppp_settings.passwd); | |
if (len > MAXSECRETLEN) { | |
AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server)); | |
len = MAXSECRETLEN; | |
} | |
BCOPY(ppp_settings.passwd, secret, len); | |
*secret_len = len; | |
return 1; | |
#else | |
int ret = 0, len; | |
struct wordlist *addrs; | |
char secbuf[MAXWORDLEN]; | |
addrs = NULL; | |
secbuf[0] = 0; | |
/* XXX Find secret. */ | |
if (ret < 0) | |
return 0; | |
if (save_addrs) | |
set_allowed_addrs(unit, addrs); | |
len = strlen(secbuf); | |
if (len > MAXSECRETLEN) { | |
AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server)); | |
len = MAXSECRETLEN; | |
} | |
BCOPY(secbuf, secret, len); | |
BZERO(secbuf, sizeof(secbuf)); | |
*secret_len = len; | |
return 1; | |
#endif | |
} | |
#endif | |
#if 0 /* UNUSED */ | |
/* | |
* auth_check_options - called to check authentication options. | |
*/ | |
void auth_check_options(void) | |
{ | |
lcp_options *wo = &lcp_wantoptions[0]; | |
int can_auth; | |
ipcp_options *ipwo = &ipcp_wantoptions[0]; | |
u32_t remote; | |
/* Default our_name to hostname, and user to our_name */ | |
if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) | |
strcpy(ppp_settings.our_name, ppp_settings.hostname); | |
if (ppp_settings.user[0] == 0) | |
strcpy(ppp_settings.user, ppp_settings.our_name); | |
/* If authentication is required, ask peer for CHAP or PAP. */ | |
if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) { | |
wo->neg_chap = 1; | |
wo->neg_upap = 1; | |
} | |
/* | |
* Check whether we have appropriate secrets to use | |
* to authenticate the peer. | |
*/ | |
can_auth = wo->neg_upap && have_pap_secret(); | |
if (!can_auth && wo->neg_chap) { | |
remote = ipwo->accept_remote? 0: ipwo->hisaddr; | |
can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote); | |
} | |
if (ppp_settings.auth_required && !can_auth) { | |
ppp_panic("No auth secret"); | |
} | |
} | |
#endif | |
/**********************************/ | |
/*** LOCAL FUNCTION DEFINITIONS ***/ | |
/**********************************/ | |
/* | |
* Proceed to the network phase. | |
*/ | |
static void network_phase(int unit) | |
{ | |
int i; | |
struct protent *protp; | |
lcp_options *go = &lcp_gotoptions[unit]; | |
/* | |
* If the peer had to authenticate, run the auth-up script now. | |
*/ | |
if ((go->neg_chap || go->neg_upap) && !did_authup) { | |
/* XXX Do setup for peer authentication. */ | |
did_authup = 1; | |
} | |
#if CBCP_SUPPORT > 0 | |
/* | |
* If we negotiated callback, do it now. | |
*/ | |
if (go->neg_cbcp) { | |
lcp_phase[unit] = PHASE_CALLBACK; | |
(*cbcp_protent.open)(unit); | |
return; | |
} | |
#endif | |
lcp_phase[unit] = PHASE_NETWORK; | |
for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) | |
if (protp->protocol < 0xC000 && protp->enabled_flag | |
&& protp->open != NULL) { | |
(*protp->open)(unit); | |
if (protp->protocol != PPP_CCP) | |
++num_np_open; | |
} | |
if (num_np_open == 0) | |
/* nothing to do */ | |
lcp_close(0, "No network protocols running"); | |
} | |
/* | |
* check_idle - check whether the link has been idle for long | |
* enough that we can shut it down. | |
*/ | |
static void check_idle(void *arg) | |
{ | |
struct ppp_idle idle; | |
u_short itime; | |
(void)arg; | |
if (!get_idle_time(0, &idle)) | |
return; | |
itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle); | |
if (itime >= ppp_settings.idle_time_limit) { | |
/* link is idle: shut it down. */ | |
AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n")); | |
lcp_close(0, "Link inactive"); | |
} else { | |
TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime); | |
} | |
} | |
/* | |
* connect_time_expired - log a message and close the connection. | |
*/ | |
static void connect_time_expired(void *arg) | |
{ | |
(void)arg; | |
AUTHDEBUG((LOG_INFO, "Connect time expired\n")); | |
lcp_close(0, "Connect time expired"); /* Close connection */ | |
} | |
#if 0 | |
/* | |
* login - Check the user name and password against the system | |
* password database, and login the user if OK. | |
* | |
* returns: | |
* UPAP_AUTHNAK: Login failed. | |
* UPAP_AUTHACK: Login succeeded. | |
* In either case, msg points to an appropriate message. | |
*/ | |
static int login(char *user, char *passwd, char **msg, int *msglen) | |
{ | |
/* XXX Fail until we decide that we want to support logins. */ | |
return (UPAP_AUTHNAK); | |
} | |
#endif | |
/* | |
* logout - Logout the user. | |
*/ | |
static void logout(void) | |
{ | |
logged_in = 0; | |
} | |
/* | |
* null_login - Check if a username of "" and a password of "" are | |
* acceptable, and iff so, set the list of acceptable IP addresses | |
* and return 1. | |
*/ | |
static int null_login(int unit) | |
{ | |
(void)unit; | |
/* XXX Fail until we decide that we want to support logins. */ | |
return 0; | |
} | |
/* | |
* get_pap_passwd - get a password for authenticating ourselves with | |
* our peer using PAP. Returns 1 on success, 0 if no suitable password | |
* could be found. | |
*/ | |
static int get_pap_passwd(int unit, char *user, char *passwd) | |
{ | |
/* normally we would reject PAP if no password is provided, | |
but this causes problems with some providers (like CHT in Taiwan) | |
who incorrectly request PAP and expect a bogus/empty password, so | |
always provide a default user/passwd of "none"/"none" | |
*/ | |
if(user) | |
strcpy(user, "none"); | |
if(passwd) | |
strcpy(passwd, "none"); | |
return 1; | |
} | |
/* | |
* have_pap_secret - check whether we have a PAP file with any | |
* secrets that we could possibly use for authenticating the peer. | |
*/ | |
static int have_pap_secret(void) | |
{ | |
/* XXX Fail until we set up our passwords. */ | |
return 0; | |
} | |
/* | |
* have_chap_secret - check whether we have a CHAP file with a | |
* secret that we could possibly use for authenticating `client' | |
* on `server'. Either can be the null string, meaning we don't | |
* know the identity yet. | |
*/ | |
static int have_chap_secret(char *client, char *server, u32_t remote) | |
{ | |
(void)client; | |
(void)server; | |
(void)remote; | |
/* XXX Fail until we set up our passwords. */ | |
return 0; | |
} | |
#if 0 /* PAP_SUPPORT > 0 || CHAP_SUPPORT > 0 */ | |
/* | |
* set_allowed_addrs() - set the list of allowed addresses. | |
*/ | |
static void set_allowed_addrs(int unit, struct wordlist *addrs) | |
{ | |
if (addresses[unit] != NULL) | |
free_wordlist(addresses[unit]); | |
addresses[unit] = addrs; | |
#if 0 | |
/* | |
* If there's only one authorized address we might as well | |
* ask our peer for that one right away | |
*/ | |
if (addrs != NULL && addrs->next == NULL) { | |
char *p = addrs->word; | |
struct ipcp_options *wo = &ipcp_wantoptions[unit]; | |
u32_t a; | |
struct hostent *hp; | |
if (wo->hisaddr == 0 && *p != '!' && *p != '-' | |
&& strchr(p, '/') == NULL) { | |
hp = gethostbyname(p); | |
if (hp != NULL && hp->h_addrtype == AF_INET) | |
a = *(u32_t *)hp->h_addr; | |
else | |
a = inet_addr(p); | |
if (a != (u32_t) -1) | |
wo->hisaddr = a; | |
} | |
} | |
#endif | |
} | |
#endif | |
static int ip_addr_check(u32_t addr, struct wordlist *addrs) | |
{ | |
/* don't allow loopback or multicast address */ | |
if (bad_ip_adrs(addr)) | |
return 0; | |
if (addrs == NULL) | |
return !ppp_settings.auth_required; /* no addresses authorized */ | |
/* XXX All other addresses allowed. */ | |
return 1; | |
} | |
#if 0 /* PAP_SUPPORT > 0 || CHAP_SUPPORT */ | |
/* | |
* free_wordlist - release memory allocated for a wordlist. | |
*/ | |
static void free_wordlist(struct wordlist *wp) | |
{ | |
struct wordlist *next; | |
while (wp != NULL) { | |
next = wp->next; | |
free(wp); | |
wp = next; | |
} | |
} | |
#endif | |
#endif /* PPP_SUPPORT */ |